* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif; background: #0f172a; color: #e2e8f0; }
.coupon-manager { max-width: 1200px; margin: 0 auto; padding: 2rem; }
header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 2rem; }
h1 { font-size: 2rem; font-weight: 700; color: #f1f5f9; }
button { padding: 0.5rem 1rem; background: #3b82f6; color: white; border: none; border-radius: 0.5rem; cursor: pointer; }
button.danger { background: #ef4444; }
.coupons-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(320px, 1fr)); gap: 1.5rem; }
.coupon-card { background: #1e293b; padding: 1.5rem; border-radius: 0.75rem; border: 1px solid #334155; }
.coupon-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 0.5rem; }
.coupon-header h3 { color: #f1f5f9; font-family: 'Courier New', monospace; background: #0f172a; padding: 0.25rem 0.5rem; border-radius: 0.25rem; }
.status { font-size: 0.75rem; font-weight: 600; }
.status.active { color: #10b981; }
.status.inactive { color: #64748b; }
.coupon-name { color: #94a3b8; font-size: 0.875rem; margin-bottom: 1rem; }
.coupon-discount { font-size: 2rem; font-weight: 700; color: #3b82f6; margin-bottom: 1rem; text-align: center; }
.coupon-stats { margin-bottom: 1rem; }
.stat { display: flex; justify-content: space-between; padding: 0.5rem 0; border-bottom: 1px solid #334155; }
.stat span:first-child { color: #94a3b8; }
.stat span:last-child { color: #e2e8f0; font-weight: 600; }
.coupon-actions { display: flex; gap: 0.5rem; }
